Hexamethyldisilane
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| Identifiers | |||
|---|---|---|---|
1450-14-2  | |||
| 3D model (Jmol) | Interactive image | ||
| 1633463 | |||
| ChemSpider | 66675 | ||
| ECHA InfoCard | 100.014.465 | ||
| EC Number | 215-911-0 | ||
| PubChem | 74057 | ||
| RTECS number | JM9170000 | ||
| UN number | 1993 | ||
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| Properties | |||
| Si2C6H18 | |||
| Molar mass | 146.39 g mol−1 | ||
| Appearance | Colourless liquid | ||
| Density | 0.715 g/cm3 | ||
| Melting point | 14 °C; 57 °F; 287 K | ||
| Boiling point | 113 °C; 235 °F; 386 K | ||
| Refractive index (nD) |
1.422 | ||
| Thermochemistry | |||
| Std molar entropy (S |
255.89 J K−1 mol−1 (at 22.52 °C) | ||
| Hazards | |||
| GHS pictograms |    | ||
| GHS signal word | DANGER | ||
| H225, H319, H334, H335 | |||
| P210, P261, P305+351+338, P342+311 | |||
| EU classification (DSD) |
 F  Xi | ||
| R-phrases | R11, R36/37, R43 | ||
| S-phrases | S16, S23, S45 | ||
| Flash point | 11 °C (52 °F; 284 K) | ||
| Related compounds | |||
| Related alkylsilanes |
Tetramethylsilane | ||
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
 verify (what is ?) | |||
| Infobox references | |||
Hexamethyldisilane is the organosilicon compound with the formula Si2(CH3)6, abbreviated Si2Me6. It is a colourless liquid, soluble in organic solvents.[1]
The Si-Si bond in hexamethyldisilane is cleaved by strong nucleophiles and electrophiles. Alkyl lithium compounds react as follows:
- Si2Me6 + RLi → RSiMe3 + LiSiMe3
Iodine gives trimethylsilyl iodide.[2]
- Me3Si−SiMe3 + I2 → 2 SiMe3I
References
- ↑ Tamejiro Hiyama, Manabu Kuroboshi, "Hexamethyldisilane" Encyclopedia of Reagents for Organic Synthesis, 2001 John Wiley & Sons. doi:10.1002/047084289X.rh015
- ↑ Olah, G.; Narang, S.C. (1982). "Iodotrimethylsilane—a versatile synthetic reagent". Tetrahedron. 38 (15): 2225. doi:10.1016/0040-4020(82)87002-6.
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